Nitrogen-rich Graphdiyne Film for Efficiently Suppressing the Methanol Crossover in Direct Methanol Fuel Cells
Liang Li , Zicheng Zuo , Feng He , Zhongqing Jiang , Yuliang Li
Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (6) : 1275 -1282.
The inhibition of the methanol crossover is one of the intractable challenges in the direct methanol fuel cell. The graphdiyne(GDY) with atomic-level pores shows great potential in realizing the zero-permeation of methanol molecules. In this paper, an ultrathin layer of nitrogen-rich GDY film with a high nitrogen content is largely prepared and readily used for retarding the methanol permeation in the state-of-the-art commercial Nafion membrane. The high N-content in this porous GDY nanofilm remarkably increases the selective suppression in methanol transfer, and single-layer GDY film can efficiently prevent 43% methanol crossover and the value of the double-layer GDY film can be high up to 69%. The power performance and the long-term stability of the cell are obviously improved due to the reduced methanol crossover.
Direct methanol fuel cell(DMFC) / Methanol crossover / Nafion membrane / Graphdiyne
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Li M. P., Wang K. H., Lv Q., Chem. Res. Chinese Universties, 2021, DOI: https://doi.org/10.1007/s40242-021-1256-6 |
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